The Work involves furnishing all labor, equipment and materials necessary to remove existing 30-inch gate valve, including bypass valves, chlorination assemblies, and associated piping, fittings, and accessories and replace with new 30-inch butterfly valves at a separate location, including new chlorination assemblies, blow-off assemblies, piping, fittings, flange insulating kits, bonding wires, accessories, and join with butt strap connection joints, installation and removal of temporary line stops, including surface restoration, traffic control, chlorination and testing necessary to connect and place in service the pipelines and associated appurtenances. The Work also involves providing all the labor, materials, and equipment necessary to replace the pipe spool for the removed 30” gate valve, and removing existing fittings and appurtenant piping on transmission line at the Bellflower Boulevard and Stearns Street intersection.